Adjusting attachment for saw-grinders.



No. 685,609. Patented oci. 29, mol.l

w. A. HuFF.

ADJUSTl-NG ATTACHMENT FOR SAW GRINDERS.

(Applicvation filed July 15, 1901.)

(No Model.)

X Ih

Unirse Sterns Parent* Unsinn;

WILLIAM A. IIUFF, on CHICAGO, ILLINOIS.

Ansusrme ArrAcHMsN-r- Foa snwi-eeinosss.

SPECIFICATION formngpart of Letters Patent No. 685,609, dated October 29, 1901.

Application filed July l5, 1901. Serial No. 68,371. CNO model.) l

'emery-wheel is used for sharpening tools,

and while it is more-especially intended for saw-grinders for either circular or gang or blade saws, yeti-it is applicable for use on grinders for other tools; and it consists'in certain peculiarities of the construction, novel arrangement, and operation of the 'various parts thereof, as willh be hereinaftermore i fullyset forth and specifically claimed.

it, referring to The objects of the invention are to provide an attachment for automatically controlling the longitudinal movement of the mandrel or shaft ofmachines of the alcove-described` character, so that the emery-wheel thereon will be adjusted with respect to the saw or tool regardless of irregularities in the face ofy the wheel or in ,the tool, to provide means for regulating thepressuie of the emerywheel against the saw or tool, 4and to afford such an attachment which shall be simple in construction, and-easily operated andattached tothe machine. i y

-ln order to, enable others skilled in the. art

Ato which' my invention pertains to make and use the same, I will now proceed'to describe the accompanying drawings,

Figure 1 isa perspective View of the upper portion of a circular-saw Sharpener of the .Covel type, showing my attachment secured thereto.- Fig. 2 is a plan'view of-a portion of a saw-grinder with my attachment .in position for operating the mandrel or shaft on which the emeryewheel is mounted. Fig.

3 is 'a detached plan view of the attachment. Fig. 4 is a front end View thereof.l Fig. is

a central longitudinalsectional view ofgthe attachment, showing the mandrel bydotted lines connected` thereto. Fig. 6 is a front end view of the attachment with the face or front plate thereof removed. Fig. is afdel drel or shaft.

Similar letters refer to like parts through out the diierent views of thedrawings.

tail View of a collar to be secured to the man A represents a portion of the support or wheel is employed forgrinding the tool.Y On

the support or main frame A and mounted in suitable bearings is a shaft or mandrel B, which carries the emery-wheel C, and also has a pulley C mounted thereon, to which power may be applied by means of a beltto rotatethe said shaft and wheel. The shaft B is so journaled in the boxes a therefor as to have a longitudinal movement. cured astride of the end of the shaft B oppo- -site from that on which the Wheel C is mounted and usually by means of the cap-screws h of the jonrnaloox is the main or supporting plate D of` my attachment,'which plate is provided with extensions D' on its front perf. tion, each of which extensionsis-formed with an-opeu-ended slot d to receive the cap-screws.

b or securing-holts therefor. As shown in Figs. 2 and 3 of the drawings, the portions D are a'slight distance apart and are united at their rear orA outer portions with an upwardly-extending bracket d', which has on itsiront or inner surface a vertical groove d2, -in which'the rer' portion 'of Athe headlhl f on the Aadjlasting-imm Erests-ifillhe Vrear end p of :the plate Dis provided with an` upwardlyextending 4bracket d3, which is provided with an o1'Jening;..oZf? for the receptionl of thea'dj uston Vthe .screw -threaded portion ot said bar 5 1 ends Vforwardly extending -Nprojections e, to

the'frontends of which is secured, by. means E l of screws, a' gnheorfront plated?, having a central opening for the passageot the shaft.

tn'fmandrel. The lower projection e extends f through the'opening between the prongs vor portions D of the main plate D of the attachment., ALocated between the plate F andthe rear or outer portion of the head E is a collar G, 'which is provided with an opening g for the reception of a set-screw g', used to secure vroe said collar to the mandrel or shaft. On the adjusting-rod Ejs located a spiral spring H,

one end of Whiclrrests against theouter surface of the bracket d', through which the rod- E' passes, andthe'other end againsta washer h on the rod E,lwhich is held in-place against the springby means of a nut h' on said rod in front of the bracket dias 'shown inthe drawings. Surrounding the .spring H is a piece of rubber tubing HJth'ich also extends from the bracket d to t-he -Washer h and assists in actuating the adj usting-rod and also in protectingthe spring. Itis apparent that I may use the spring H without lthe tubing H or may use the tubing without the spring.

- From the foregoing and byrfere'nce to thedrawings it will be readily understood a'nd clearly seen that the slots d in the front por-- tion of the main plate D of the attachment will permit it to be adjustably secured withV respect to the shaft or mandrel B and that the end of the mandrel will pass throughth'e opening in the guide-plate F,vw hen the collar G may be fixed thereon by means ofthe setscrew g, used for said purpose. The adjusts. ing-rod may be adjusted and held against -further forward movement by means'of the nut d6 and jam-nut (Z7 and the tension of said rod regulated by means of the washer h. an'd" nut h4', so that the desired pressure of! the vemery-Wheel C against the sawor toolimay' be attained'and in such a manner that the said' wheel will yield from the saw or tool when irregularitiesthereon appear. 4

To cause the attachment to automatically actuate the mandrel or shaft, the nuts d and means to adjustably- 'secure it on-the machine, anI adj nsting'rod 0l7 should be -loosened su cientlyto allow of two' forwardly-extending and slotted portions and upwardly-extending brackets,of a spriugv actuatedadjusting-rod located in openings in said brackets'andcarrying at its front end a head .provided withv :forward extensions, an

apertn red front or guido plate secured'v tosaid extensions, a collar locatedbetween'- said plate andthe head and havingjassctscrevr 'to tix it to the. mandrel, and vmeans jon" the adjnsiting-` rod to adjust i-t'andi to regulate the tension of fthe spring thereon,substantiallyas'described.

.i 2.V An attachment forsa\vgri 11`ders and like machineszcomprisinga main` plate having i -x'm'lvably mounted in the u pper surface of-.tliesaid -pl ate, a head on ,the frontend of said-rod, al guide-,plate secured ,-to said head,la',.collar located Vbetween the vguide-plate and head, a spring encircling a portion of the-rod', land eans/to adjust the'l rod and to regulatethe tension of the spring, substantially as described.

A -WILLIAM A. HUFF. yWitnesses: f v

CEAS. C. TILLMAN,

y HATTIE A. THOMAS. 

